Here is a incredible collection of break beats that was curated by Young Guru (He was the in-house engineer for Jay-Z’s record label) There are over 1200 break beats here. It is a goldmine if you are into using and/or chopping up breaks in your code.
Disclaimer: These breaks are in mp3 format. They also aren’t always exact loops, so you may need to do a bit of maintenance to convert them to a ready to use format. I’ve been cleaning them up in Audacity but it has been well worth it!